Acoustic material



Sept. l5, 1931. M. MAzER ACOUSTIC MATERIAL Filed June 7, 1929 gin/mentor,

Marcus Mlzer' Clitoz nu, a

Patented Sept. 15, 1931 UNITED STATES MARCUS MAZER, F IPILADELPHIA, .PENNSYLVANA ACOUSTIC MATERIAL Application led .Tune 7, 1929.

The present invention relates to sound absorbing or acoustic material, for use particularly in` Wall, floor and ceiling construction to control the acoustics of a room or other enclosure, and has for an object to provide an improved means for supporting the material against sagging or `displacement incident to the weight and character ofthe material.

This application constitutes a continuation in part of my prior application filed January 19, i928, Serial No. 247,956, and which matured into Patent No. 1,7 21,461 granted July 16, 1929. I

Another object of this invention is to provide a material of this general character which is also capable of use in thermal insulation, and which may embody a felt body portion with a reinforcement of Wire mesh :for holding the felt body portion together and to give it the necessaryv rigidity against sagging, and at the same time providing' a .support Which is pliant enough to admit bending or curving of the material to adapt itto dat and curved surfaces.

While various materials of a fibrous nature may be employed for the body portion, felt, particularly hair felt, is recognized by 'acoustic engineersas being a sound absorbing material of a high degree. Among other ma teriais possessing the desired characteristics are known fibrous and porous substances, s uch as minera-l Wool and the like which possess to various degrees the sound absorbing qualities which are found in felt.

Felt, however, is a material which is more readily handled and has proven by experience to be very effective in the correction of acoustic defects.

A further object of this invention is to provide an acoustic material which may be laid upon orsecured against or embedded in floors, Walls, ceilings or the like and will not be deformed either by vibration, changes in atmospheric conditions` moisture or by its own weight so that a permanent and.r reliable material or sheet of material is provided for vuse in practically all manner of installation, to

provide an efficient acoustic and thermal insulation for the room orf enclosure.

5 When the sound absorbing material sags tcularly pointed out in the claims appended Serial No. 369,233.

or becomes displaced, it destroys the uniform absorption of the sound Waves and the smooth flat surface of the ceiling or wall and thus destroys the aesthetic appearance of the room or enclosure with which the architects are 5 greatly concerned. c.

With the foregoing and other objects in view. the invention will be more fully described hereinafter, and will be more parhereto. y

In the drawings. wherein like symbols refer to like. or corresponding parts throughout they several views,

Figure l is a fragmentary plan view of a portion of sound absorbing or acoustic ma terial having the support embedded therein, part of the material being breken away to show the support. l

Figure 2 is a y fragmentary transverse section taken through the acoustic material, showing the supporting mesh embedded therein. i

Figure 3 is a fragmentary perspective View of a. portion of the material having a marginal retaining meansvsecured thereto` the retaining means and the material being shown brokenl away in part.

Figure 4 is a sectional vienv similar to Figure 2 but showing a modified 'form of the material wherein the support is secured against the upper surface of the material, and

Figure 5 is a similar view showing a fur'- ther modification wherein the Wire mesh is shown at the lower face of the material.

Referring.- noW to the drawings, the acoustic materia-l comprises a body portion l0 Which may be of felt, such as hair felt, which is relatively loosely7 compacted. or uncompressed. the hairs or fibers being matted tovarious degrees according to the perccntage of absorption required and sufficiently to -maintain the body portion together. This relatively free and uncompressed body portion 10 is adapted to be placed over the ceiling, Wall or iioor, or certain parts thereof. for the purpose of absorbing sound and eliminating or reducing reverberatory sound vfibrous material is provided with a support 1l, which is preferably incorporated in the structure of the ,body portion, asV shown in Figures 1, 2 and j3, and the support 11 preferably comprises relatively large open mesh,

Wire or the like to prevent stretching of the body portion and hold the same intact against sagging yor deformation, but which at the same time is capable of being curved or bent to adapt the material to surfaces which are plane or of any curves or configurations found-in the installation of the material. The purpose of this bendable 'and substantially unstretchable support 11 is to hold the material inlits normal Condition and from sagging or displacement from any of the various surfaces or the like to which the material may be applied.

As shown particularly in Fig/ure 2, the Wire mesh 11 may be embedded in the body portion during the -felting or building up of the same as a certain thickness of the felt may be matted together, the wire meshing may be' then spread over the upper surface of the thickness so formed, andV` the fibers then built up upon the first thickness eX-.

tending through the meshing and being matted throughout as an integral structure including the Wire meshing.

. stretched so as to prevent the wire mesh 11- an'd the material or body portion 10 supported thereon lfrom lWith this structure a sound` absorbing or acoustic material is provided which has a loosely matted body portionl() of fibrous material with both its upper' and lower side faces free and unobstructed and wherein the material is relatively free and uncompressed with its fibers loosely held together. I

The single sheet of wire meshing is coextensive 'throughout the b`od`y portion 10, i's embedded therein and supports the body portion without interfering with the freev and loosecondition of the loselyf matted lt is apparent that this material may be 'secured against a wall or ceiling by any suitable fastening devices or means which may engage through the meshes of the wire support 11 and hold the latter taut and sagging or displacement. I A.

As shownin Figure 3, the sheet of acoustic -material may be provided with a marginal retaining means 12 'which maybe inthe form of a flexible or fabric strip which is` overturned .aboutjthe' marginal edge of the material, and which voverlaps the opposite side faces thereof and is /secured in 'place by a line of stitching 13 which may pass entirely through the marginal portion of the material and through the meshes of. the .l wlre support -11 to hold the material fromv fraying or breaking away from the support,

.cing'and held thereto by tuft wires 16 or the like which extend downwardly through the material 14 to hold it against the underside of the wire mesh 15.

The modification shown in Figure 5 shows the fibrous material 17 resting on the upper surface of the wire mesh `support 18, so as to hold the material in uncompressed position, particularly in ceilings or the like.

in all forms of the invention disclosed the wire ,mesh is embedded either between the opposite side faces or in either one of the same as shown in Figures 2, 4 and 5. It is obvious that various changes and vmodications may be made in the details of construction and design of the above specifically described embodiment of this invention without' departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims What is claimed is p 1. An acoustic material comprising a relatively loosely matted fibrous body portion, and a wire mesh support coextensive therewith and embedded in the body portion to maintain the same against sagging and deformation. f

-2. An acoustic material comprising a body portion of loosely matted fibrous material, and a' support of reticulated metallic construct-ion embedded in the material and being coextensive therewith, to maintain the material against stretching, sagging and deformation. l

body portion offloosely matted sound absorb- Til ing fibrous material having both side faces free and unobstructed to leave the body portion of the material free and uncompressed and with the fibers loosely held together, and a single sheet of wiremeshing coeXtens'ive with the body portion and engagingthe same and adapted to support the body portion against sagging when fixed in position with its fibers in said loose andv free condition.

4'. Acousticy material Acomprising a body portion of loosely matted fibrous material, a wire mesh support embedded in the material and being coeXtensive therewith, and a lexible binding strip secured about the marginal portion of th/e material and having a line of stitches engaged through the wire mesh-to hold the fibrous material to the wire mesh at the border portion.

l rIn testimony whereof l affix my signature'.

MARCUS 

